Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems

Tobias Fehenberger; Domaniç Lavery; Robert Maher; Alex Alvarado; Polina Bayvel; Norbert Hanik

doi:10.1109/LPT.2015.2514078

Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems

Tobias Fehenberger
, Domaniç Lavery
, Robert Maher
, Alex Alvarado
, Polina Bayvel
, Norbert Hanik

Associate Professorship of Line Transmission Technology

Research output: Contribution to journal › Article › peer-review

100 Scopus citations

Abstract

Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

Original language	English
Article number	7370770
Pages (from-to)	786-789
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	28
Issue number	7
DOIs	https://doi.org/10.1109/LPT.2015.2514078
State	Published - 1 Apr 2016

Keywords

Achievable information rates
digital coherent transceivers
digital signal processing
mutual information
probabilistic shaping
signal shaping

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10.1109/LPT.2015.2514078

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title = "Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems",

abstract = "Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.",

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AU - Maher, Robert

AU - Alvarado, Alex

AU - Bayvel, Polina

AU - Hanik, Norbert

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AB - Probabilistic shaping of quadrature amplitude modulation (QAM) is used to enhance the sensitivity of an optical communication system. Sensitivity gains of 0.43 and 0.8 dB are demonstrated in back-to-back experiments by the shaping of 16QAM and 64QAM, respectively. Furthermore, numerical simulations are used to prove the robustness of probabilistic shaping to a mismatch between the constellation used and the signal-to-noise ratio (SNR) of the channel. It is found that, accepting a 0.1-dB SNR penalty, only four shaping distributions are required to support these gains for 64QAM.

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KW - digital signal processing

KW - mutual information

KW - probabilistic shaping

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Sensitivity Gains by Mismatched Probabilistic Shaping for Optical Communication Systems

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Keywords

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